Science, Space and Technology News 2024
Polymetallic nodules, collected from the ocean floor, sit in simulated seawater in chemist Franz Geiger’s laboratory at Northwestern University. Researchers have discovered that metallic minerals on the ocean floor produce oxygen without sunlight, a finding that challenges previous beliefs that only photosynthetic organisms generate oxygen.
Andrew Sweetman, of the Scottish Association for Marine Science , made the “dark oxygen” discovery while conducting ship-based fieldwork in the Pacific Ocean. Northwestern’s Franz Geiger led the electrochemistry experiments, which potentially explain the finding. Geiger is the Charles E. and Emma H. Morrison Professor of Chemistry at Northwestern’s Weinberg College of Arts and Sciences and member of the International Institute for Nanotechnology and the Paula M. Trienens Institute for Energy and Sustainability.Sweetman made the discovery while sampling the seabed of the Clarion-Clipperton Zone, a mountainous submarine ridge along the seafloor that extends nearly 4,500 miles along the north-east quadrant of the Pacific Ocean.
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